The Revefenacin segmentation by application is primarily driven by disease severity within the chronic obstructive pulmonary disease (COPD) continuum. Severe COPD patients, representing roughly 55 % of the total addressable market, demand continuous bronchodilation to mitigate frequent exacerbations, thereby generating the largest revenue share. Moderate COPD accounts for about 35 % of the market; these patients require maintenance therapy but experience fewer acute events, resulting in a moderate contribution to overall sales. The remaining Mild COPD cohort, estimated at 10 % of the market, utilizes Revefenacin mainly for early intervention, which translates into a smaller yet strategic portion of the market size. By quantifying each severity tier, analysts can attribute revenue streams to clinical need, forecast growth trajectories, and allocate resources efficiently across the disease spectrum.